Implement for detaching boiler-tubes.



PATENTED MAY 17, 1904.

H. A. POPPENHUSEN. IMPLEMENT FOR DETAGHING BOILER TUBES.

APPLICATION FILED MAE. 12. 1903.

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No. 760.148. PATENTED MAY 17, 1904. H. A. POPPENHUSEN.

IMPLEMENT FDR DETAGHING BOILER TUBES.

APPLICATION FILED MAR. 12, 1903.

H0 IODEL. 2 SHEETS-SHEET 2.

'IIIIIIIIIIAVIFiI I I IIpI I UNITED STATES Patented May 1'?, 1904.-

PATENT OFFICE.

IMPLEMENT FOR DETACHING BOILER-TUBES.

SPECIFICATION forming part of Letters Patent No. 760,148, dated May 17,1904.

Application filed March 12, 1903.

To all whom it mag concern:

Be it known that I, HERMAN A. POPPEN- IIUSEN, of Chicago, in the countyof Cook and State of Illinois, have invented certain new and usefulImprovements in Implements for Detaching Boiler-Tubes; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part ofthis'specification.

' This invention relates to anovel tool or implem ent for use indetaching boiler-tubes from the tube-sheet or head in which they aresecured.

The invention consists in the matters hereinafter described, and pointedout in the appended claims.

In the accompanying drawings, illustrating my invention, Figure 1 is asectional view taken on a vertical plane through one end of the tube andthe adjacent walls of the waterhead of the tubular boiler and alsolongitudinally through a preferred form of implement embodying myinvention. Fig. Q'isa plan section taken on line 2 2 of Fig. 1. Fig. 3is a detail section taken upon line'3 3 of Figs. 2 and 4. Fig. 4 isacross-sectional view taken upon line 4 A of Figs. 1 and 3. Fig. 5 is asectional view similar to Fig. 1, showing a somewhat similar form ofconstruction in the tool or implement. Fig. 6 is adetail plan section ofthe construction shown in Fig. 5. Fig. 7 is a cross-section taken online 7 7 of Fig. 5. Fig. 8 is a view illustrating in side elevation the,workingends of an implement embodying the same generalfeatures ofconstruction that are shown in the other figures of the drawings, but ofmore simple character in its details.

As shown in the several figures of the drawings, A indicates the end ofa water-tube, B the tube-sheet in which the end of the tubeA is securedand which forms the inner wall of the Water-head, and Ba plate formingthe outer wall of the water-head and which is provided with an openingor orifice 6, arranged in alinement or opposite the end of the tube A.

First referring to the form of implement Serial No. 147,388. (No model.)

illustrated in Figs. 1 to 4:, C indicatesthemain part or head of thesame, and D a tubular extension forming a long and rigid handle onlever, these parts together constituting the shank of the tool. The headC is provided at its end or extremity with two parallel bearing-arms GC, provided with laterally-extending conveXly-curved bearing parts orextensions G which are adapted for contact with the inner surface of the.tube A, into which the end portion of the head 0 is inserted when thetool is in operation. parts of the lateral projections (1 of the arms Care preferably toothed or serrated, so that they will grip the interiorof the tube and prevent the tool from slipping when said extensions arein bearing against the sidewall of the tube. Pivotally mounted on thehead G is a gripping-hook E, said hook being adapted to extend from thehead C at the same side of the same at which the projections are locatedand being adapted to swing at its free end in the direction of thelongitudinal axis of the shank. As herein shown, said gripping-hook ismounted on a pivot-pin F, which extends through the arms C O, and.

the inner end of the gripping-hook is exs tended between said arms andprovided" with bearing-apertures to engage said pivotpin. As shown insaid figures of the drawings, moreover, the said gripping-hook E isforked at its inner end, or that which engages thepin F, and its sideportions are located adjacent to or in contact with the inner faces ofthe arms C C. over, mounted to swing freely on the pinF, and a spring isapplied to the same in such manner as to throw the outer or free end ofthe hook toward the outer ends of the arms C, the spring employed in theconstruction in the drawings being a sheet-metal spring G of U formattached to the head C and bearing at its free end against the rear faceof'the said gripping-hook. The free end of the gripping-hook is providedwith a gripping tooth or projection 4 which has an angular, sharpened,or biting end and is directed in.- wardly or toward the head C.

The. gripping-hook E is, more-.

The marginal The said gripping-hook and its tooth are so arranged withrespect to the arms C that when the lateral projections C at the ends ofsaid arms are engaged with the inner surface of the tube the end of thetooth will have gripping or biting engagement with the outer surface ofthe marginal part of the tube which projects beyond or outside of theplate B. so that when the free end of the shank of the implement isswung in a direction to carry the grippinghooks inwardly with respect tothe tube the ends of the tooth, having holding engagement with the tubeat one point in its circumference,

will bend the part of the tube engaged thereby inwardly, and thus freeit from the edge of the wall with which it is in contact. When thegripping-hook is thus engaged with edge of the tube, the lateral bearingprojections C C will be in bearing against the inner surface of thetube, and as the shank B is moved or swung in a direction to carry thegrippinghook inwardly said projections C will roll upon the innersurface of the tube, the slipping of the implement endwise on the tubebeing prevented by the serrated or toothed edges of the said extensionsC An advantage is obtained from making the extensions 0 ofconvexlyrounded form and serrating them, as described, for the reasonthat as the projections roll upon the inner surface of the tube theywill, by reason of their gripping engagement therewith, afford ashifting fulcrum for the lever and move or shift the hook in a directiontoward the interior of the tube, thereby insuring the maintenance of thegripping engagement of the biting end of the hook with the margin of thetube as the latter is bent inwardly. It will of course be understoodthat in the operation of the implement in the manner described thegripping-hook at one movement of the implement will operate to bendinwardly only a small part of the circumference of the end of the tube,so that in order to completely release the end of the tube from theplate B it is necessary to repeat the operation at a number of differentpoints one-half of its circumference, after which thetube may be readilyloosened and removed. It will ofcourse be understood that in operatingupon a tube the end of which is secured in the innermost of the twoplates B and B, constituting the water-head of a boiler, it is necessaryto introduce the implement through the opening 6, provided in the outerplate B for the purpose of cleaning the tube, and by reason of therelatively small size of the said opening the implement can be moved orswung a short distance only before its shank will come in contact withthe edge of the said openingb, toward which it is being moved or swung.

It is, however, often necessary to provide for 5, because the movementof said hook permitted by the use of the hole 6 is necessarily short. Toafford such greater extent of movement in the said gripping-hook withoutlengthening the arms C C within the limited movement afforded by theopening 6, I provide for a lateral adjustment upon the head 0 of thepivot of the said hook E, and I so construct the parts that after theedge of the tube has been bent inwardly as far as is possible by theswinging or movement of the shank the hook may then be adjusted bodilyinward, so that when a new grip is taken upon the part of the end of thetube already depressed or drawn in by previous action of the tool asecond action thereof will draw the inwardly-deflected part stillfarther in ward and such inward adjustment of the gripping-hook, ifnecessary, be repeated several times untilthe inwardlydeflected part ofthe tube end is drawn inward far enough for the purpose desired. Asshown in said Figs. 1 to 4, devices for shifting or adjusting theposition of the gripping-hook E are provided as follows: The portions ffof the pivot F which are engaged by the parts or arms of thegripping-hook E are made smaller than the end portions of said pin F,which engages the arms C C, and are arranged eccentrically with respectto the said larger part of said pin, so that by turning the pin theeccentric bearing parts ff will be carried inwardly or outwardly andshift or move the position of the gripping-hook to correspond with theposition of said eccentric parts. For

turning the pivot F the same, as shown in Figs. 1 to L, is provided witha gear-wheel H, which is located at the central part of the pin orbetween the eccentric portions f f thereof and the teeth of which areengaged with a worm l, which is mounted on a shaft I, having suitablebearings in the head C and extending through the lever-arm D to theouter end of the same, where it is provided with a hand-wheel i, bymeans of which it may be turned. By the construction described obviouslythe pin F may be turned for'adjusting the gripping hook F bymanipulating the wheel 6 and without the necessity of removing theimplement from its engagement with the tube.

In using the implement made as described the gripping-hook E will firstbe adjusted in its position of greatest extension. The end of the leverwill then be inserted in the end of the tube and the tooth e of the hookengaged 4 with the edge of the tube and then moved for so far aspossible or until it comes in contact with the edge of the opening 6toward which it is moved. If it is desired to depress the edge of thetube still further, the lever is then thrown backwardly and the hand-wheel i turned so as to shift or move the eccentric parts f f of thepivot in a direction to carry or draw the gripping-hook inward, and anew hold is then taken on the part of the tube first b nt and the sameagain drawn inwardly as far as permitted by the angular movement of thelever.

In Figs. 5, 6, and 7 I have shown a somewhat different construction inmeans for adjusting the pivot of the gripping-hook. In this instance thesaid hook is connected with the lever by means of a pivot-pin F, whichis adapted to slide at its end in transverse grooves c 0 in the arms Cof the tool. For shifting or moving laterally the said pin F two wedgesJ are arranged to slide endwise on the inner faces of the arms CC, saidwedges hearing at their outer edges against inwardly-extending ribs 0 onthe said arms. The wedges are connected with each other by a cross-pieceJ ',Fig. 6, which is provided with a central aperture to receive theinner end of a screw-shaft K, which extends through the head C of thetube to the outer end or extremity thereof. The said shaft K is providedwith shoulders at the opposite sides of the cross-piece J, so that theshaft may turn in the said cross-piece, but is held from endwisemovement with respect thereto, and the shaft is screw-threaded in itspart which passes through the head C,so that when the shaft is turned itwill be moved endwise and the wedges J J thereby given endwise movementin a manner to carry the pivot-pin F inwardly or outwardly. Said shaft Kis shown as provided at the outer end of the lever with a hand-wheel Kc,by which it may be readily turned.

Fig. 8 illustrates a simple form of implement embracing the generalfeatures of construction hereinbefore set forth. As shown in said Fig.8, M indicates the shank or stock of the tool, which is provided at itsend with a prong M and a tooth M The prong M constitutes an extension ofthe main part of the stock and is provided with a laterallydirected androunded end on and adapted to bear against the inner curved face of thetube A. The hook M extends laterally from one side of the main part ofthe stock and has at its extremity a socket adapted to receive anadjustable tooth or bit N, the working end of which is directed inwardlyor toward the prong i Said tooth N is so arranged with respect to theprong M that when the end an of said prong is bearing against the innerwall of the pipe or tube the tooth will be in position to act upon themargin of the tube which projects beyond the tube-plate, as clearly seenin Fig. 8. A set-screw n is shown as inserted through the arm M andendwise into the socket which receives the tooth or bit N ,saidset-screw serving to effect adjustment of the bit and enabling theposition of the same to be changed with respect to the arm M in the samemanner and with the same result as in the case of the gripping-hookshown in the other figures of the drawings.

I claim as my invention-- 1. An implement for detaching boiler-tubescomprising a lever provided at its working end with alaterally-extending bearing arm or projection for contact with theinterior of the tube and having a laterally-extending hook which isprovided, adjacent to said bearing arm or projection, with a biting endor tooth which is directed toward the lever and is adapted to grip theend margin of the tube which projects from the tube-sheet, saidlaterally-ex'tending bearing arm or projection having a convexly-curved,serrated bearingsurface affording a shifting fulcrum for the lever.

'2. An implement for the purpose set forth comprising a lever providedat one end with a laterally-extended bearing projection and havingadjacent to said bearing projection a laterally-extended gripping-hook,a pivot connecting said hook with the lever, the pivot being adjustablelaterally on the lever, and means for effecting adjustment of saidpivot.

3. An implement for the purpose set forth comprising a lever and alaterally-extending gripping-hook which is laterally adjustable on thelever, and operating means for shifting the position of said hookextending lengthwise of the lever.

4. An implement for the purpose set forth comprising a lever providednear one of its ends with a laterally-extending grippinghook, apivot-pin connecting said hook with the lever, and means for shifting ormoving said pivot-pin laterally in the lever embracing anoperating-shaft which extends through the lever to the outer endthereof.

5. An implement for the purpose set forth comprising a lever, agripping-hook which projects laterally from the said lever near one endthereof, an eccentric pivot-pin by which said hook is connected with thelever, a gearwheel on said pivot-pin, a worm engaging said gear-wheel,and an operating-shaft at tached to the said worm.

In testimony that I claim the foregoing as my invention 1 affix mysignature, in presence of two witnesses, this 7th day of March, A. D.

HERMAN A. POPPENHUSEN. Witnesses:

(J. CLARENCE PooLE, GERTRUDE BRYCE.

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